Microsoft Corporation, is a multinational computer technology corporation. The History of Microsoft began on April 4, 1975, when it was founded by Bill Gates and Paul Allen in Albuquerque.[1] Its first popular product was DOS - an operating system first released in the early 1980s. Its current best selling products are the Microsoft Windows operating system and the Microsoft Officesuite of productivity software. The company has now become largely successful with a global annual revenue of US$44.28 billion and 76,000 employees in 102 countries. It develops, manufactures, licenses, and supports a wide range of software products for computing devices.[2][3][4]